Miley Cyrus penned an adorable handwritten note to her alter ego, Hannah Montana, and fans can't enough!Wednesday marked 15 years since first premiered on the Disney Channel, and in honor of the special day, the 28-year-old singer took to Twitter to reminisce over what it was like living a double life as two characters — Miley Stewart and Hannah Montana — on the beloved series. The show ran from March 2006 to January 2011, while a was released in 2009.«Hi Hannah, It's been a while.